基于SAGD研究注采参数调整对开发效果的影响
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摘要
重力泄水辅助蒸汽驱是目前辽河油田特深层巨厚砂岩稠油油藏的主要开发方式。针对地下存水量大、操作压力高引起蒸汽热利用率低等问题,通过双水平井与直井组合,上水平井大量注汽提升蒸汽干度,下置水平井重力泄水降低操作压力,直井主力采油,以达到提高热利用率及油藏动用程度的目的。储层埋藏深、黏度高、隔夹层发育,直平组合井网归属立体开发渗流,独特的油藏特性及井组开发特点导致其开发机理与常规的蒸汽驱存在较大的差别。基于渗流力学、传热学、数值计算方法等理论,建立了稠油重力泄水辅助蒸汽驱数值模型,研究开发过程中注采参数调整对开发效果的影响。
Gravity drainage assisted steam flooding is the main development method of the extremely deep thick sandstone heavy oil reservoir in Liaohe oilfield. In view of the large underground water storage capacity and high operating pressure, the steam heat utilization rate is low. Through the combination of the double horizontal well and the vertical well, the large steam injection in the upper horizontal well increases the steam dryness, and the gravity drainage in the lower horizontal well reduces the operating pressure, main oil production is carried out in the vertical well, in order to achieve the purpose of improving heat utilization and the use degree of the reservoir. The reservoir is deeply buried, crude oil has high viscosity, and the interlayer is developed. The horizontal-vertical composite well network belongs to the three-dimensional development way, and the unique reservoir characteristics and well group development characteristics lead to a large difference between its development mechanism and conventional steam flooding. Based on the theory of seepage mechanics, heat transfer and numerical calculation methods, a numerical model for heavy oil gravity drainage auxiliary steam flooding was established, and the influence of injection and production parameter adjustment on development effect was investigated.
Gravity drainage assisted steam flooding is the main development method of the extremely deep thick sandstone heavy oil reservoir in Liaohe oilfield. In view of the large underground water storage capacity and high operating pressure, the steam heat utilization rate is low. Through the combination of the double horizontal well and the vertical well, the large steam injection in the upper horizontal well increases the steam dryness, and the gravity drainage in the lower horizontal well reduces the operating pressure, main oil production is carried out in the vertical well, in order to achieve the purpose of improving heat utilization and the use degree of the reservoir. The reservoir is deeply buried, crude oil has high viscosity, and the interlayer is developed. The horizontal-vertical composite well network belongs to the three-dimensional development way, and the unique reservoir characteristics and well group development characteristics lead to a large difference between its development mechanism and conventional steam flooding. Based on the theory of seepage mechanics, heat transfer and numerical calculation methods, a numerical model for heavy oil gravity drainage auxiliary steam flooding was established, and the influence of injection and production parameter adjustment on development effect was investigated.
引文
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[2]孟珊,刘洋.重力泄水辅助蒸汽驱油水分异影响因素分析[J].当代化工,2016,45(07):1611-1613+1616.
[3]冯翠菊,冯可欣,王春生,孙启冀.蒸汽辅助重力泄油压力梯度场分布特征研究[J].天然气与石油,2017,35(02):64-69.
[4]仸芳祥,周鹰,孙洪安,张金红.深层巨厚稠油油藏立体井网蒸汽驱机理初探[J].特种油气藏,2011,18(06):61-65+126.
[5]仸芳祥,孙洪军,户昶昊.辽河油田稠油开发技术与实践[J].特种油气藏,2012,19(01):1-8+135.
[6]Chang J,Ivory J J,Tunney C.Numerical simulation of SAGD with vertical Slimholes[C].Canadian Unconventional Resources Conference.Society of Petroleum Engineers,2011.
[7]Boberg T C.Calculation of the production rate of a thermally stimulated well[J].Journal of Petroleum Technology,1966,18(12):1,613-1,623.
[8]Coats K H,Nielsen R L,Terhune M H,et al.Simulation of threedimensional,two-phase flow in oil and gas reservoirs[J].Society of Petroleum Engineers Journal,1967,7(04):377-388.
[9]Shutler N D.Numerical,three-phase simulation of the linear steamflood process[J].Society of Petroleum Engineers Journal,1969,9(02):232-246.
[10]胡静,刘小波,桑国强.水平井蒸汽辅助重力驱物理模拟相似准则及应用[J].科学技术与工程,2014,14(12):31-36.
[11]冯科.FQ孔隙型碳酸盐岩油藏注水及注气优选大模型实验研究[D].西南石油大学,2016.
[12]雷占祥,姜汉桥,陈月明,刘同敬,杜庆军,金显鹏.稠油蒸汽吞吐开采过程中焖井压降解释研究[J].大庆石油地质与开发,2006(04):92-95+125.
[13]唐亮.稠油油藏CO2泡沫蒸汽驱提高采收率技术研究[D].中国地质大学(北京),2009.
[14]孙振宇.洼59重力泄水辅助蒸汽驱技术研究与应用[D].东北石油大学,2015.